<svg viewBox="25 25 50 50" class="circular">
  <circle cx="50" cy="50" r="20" fill="none" class="path"></circle>
</svg>

<style>
  .circular {
    height: 42px;
    width: 42px;
    animation: loading-rotate 2s linear infinite;
  }
  .path {
    animation: loading-dash 1.5s ease-in-out infinite;
    stroke-dasharray: 90, 150;
    stroke-dashoffset: 0;
    stroke-width: 2;
    stroke: #409eff;
    stroke-linecap: round;
  }
  @keyframes loading-rotate {
    100% {
      transform: rotate(1turn);
    }
  }
  @keyframes loading-dash {
    0% {
      stroke-dasharray: 1, 200;
      stroke-dashoffset: 0;
    }
    50% {
      stroke-dasharray: 90, 150;
      stroke-dashoffset: -40px;
    }
    100% {
      stroke-dasharray: 90, 150;
      stroke-dashoffset: -120px;
    }
  }
</style>

